PGLYRP2 and systemic lupus erythematosus: ANOVA's post-hoc test LSD-t test showed that compared with that in healthy volunteers (3938.56 ± 576.07 pg/mL), serum PGLYRP2 was significantly higher in cases with stable SLE (4468.99 ± 457.02 pg/mL), active LN (5152.93 ± 446.13 pg/mL) or NP-SLE (5141.52 ± 579.61 pg/mL) (Fig. 1A).